package com.bdqn.springweb;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import java.io.PrintWriter;

public class AuthorizationInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if(request.getSession().getAttribute("loginUser") == null) {
            response.setContentType("text/html;charset=utf-8");
            PrintWriter out = response.getWriter();
            out.println("<script>alert('请先进行登录，再进行后续操作！(Interceptor 控制)');location.href='"+request.getContextPath()+"/login.jsp'</script>");
            return false;
        }else {
            return true;
        }
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {}
}
